Alert archive / Severe Thunderstorm Watches
Severe Thunderstorm Watches in the United States, 2012
503 severe thunderstorm watches in 2012. Each alert counts once, however many counties it covered. The archive of severe thunderstorm watches reaches back to 1997.
Severe Thunderstorm Watches by state
Each state shaded by its count. Tap a state for its own archive.
- Severe Thunderstorm Watches
- 503
- Busiest month
- May100 severe thunderstorm watches
- Busiest day
- July 1, 201211 severe thunderstorm watches
Over time
By month
By state
Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.
- Texas105
- Oklahoma67
- Indiana62
- Illinois56
- Kentucky54
- Kansas52
- Missouri50
- Minnesota47
- Iowa44
- Arkansas42
- Nebraska42
- Ohio40
- South Dakota40
- Mississippi36
- North Carolina35
- Virginia35
- Wisconsin34
- West Virginia34
- Tennessee34
- Louisiana33
- Pennsylvania31
- Georgia25
- Alabama24
- North Dakota23
- South Carolina23
- Maryland22
- New York21
- Michigan20
- New Mexico19
- New Jersey18
- Montana17
- Connecticut15
- Colorado13
- Delaware12
- District of Columbia11
- Massachusetts10
- Florida10
- Wyoming10
- New Hampshire8
- Vermont5
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowThe tornado archiveThe radar archive20112013
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.